一、查看表占用空间大小语句:
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select t.segment_name, t.segment_type, sum(t.bytes / 1024 / 1024) "占用空间(M)"from dba_segments twhere t.segment_type='TABLE'group by OWNER, t.segment_name, t.segment_type; |
二、查看表空间占用空间大小语句:
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select a.tablespace_name,a.bytes/1024/1024 "Sum MB",(a.bytes-b.bytes)/1024/1024 "used MB",b.bytes/1024/1024 "free MB",round(((a.bytes-b.bytes)/a.bytes)*100,2) "percent_used"from(select tablespace_name,sum(bytes) bytes from dba_data_files group by tablespace_name) a, (select tablespace_name,sum(bytes) bytes,max(bytes) largest from dba_free_space group by tablespace_name) b where a.tablespace_name=b.tablespace_name order by ((a.bytes-b.bytes)/a.bytes) desc |